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How to uininstall the JacksBot remote access trojan?

Also Known As: jRAT malware
Type: Trojan
Damage level: Severe

What is JacksBot?

JacksBot (also known as jRAT) is the name of a Java-based Remote Access Trojan (RAT) that can be ported to run not only on Windows but also on macOS and Linux. Typically, cybercriminals distribute RATs with the purpose to remotely monitor and control infected machines.

Most of them use RATs to steal sensitive information or proliferate other malware. Research shows that JacksBot can access webcam and log keystrokes. If there is a reason to suspect that JacksBot or any other RAT is installed on a device, then it should be removed from it immediately.

JacksBot malware

As mentioned in the introduction, JacksBot can log keystrokes (record keyboard input/log the keys victims press using their keyboard).

Usually, cybercriminals use the keylogging feature to capture personal, financial information like bank account numbers, social security numbers, PIN codes, credit card details, login credentials (email addresses, usernames, passwords), and other sensitive information.

In other words, the attackers target information that could be used to steal identities, personal accounts and use them to make fraudulent purchases, transactions, spread malware, access other personal information, send spam, and for other malicious purposes. Also, JacksBot can access the webcam.

It means that the attackers can record their victims and then use recorded videos to blackmail them. It is important to mention that many RATs are capable of executing commands (via Command Prompt, PowerShell), downloading and opening files.

RATs with such features are used to install additional malware or other unwanted software (e.g., ransomware, other Trojans, cryptocurrency miners) on the infected machines.

Additionally, there are RATs that can manage (copy, move, delete, rename, etc.) files stored on the infected computer), capture screenshots, access the microphone, and perform other actions. In one way or another, most RATs can be used to cause serious damage.

Threat Summary:
Name jRAT malware
Threat Type Remote Access Trojan, Keylogger
Detection Names BitDefender (Trojan.GenericKD.45914344), ESET-NOD32 (A Variant Of Java/Kryptik.AHE), Fortinet (Java/Agent.BKZ!tr), TrendMicro (TROJ_GEN.F04IE00CH21), Full List (VirusTotal)
Symptoms Remote Administration Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, monetary loss.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
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In conclusion, RAT is a type of malware that can be the reason behind serious issues like loss of access to various personal accounts (email, banking, social media, etc.), identity theft, monetary, data loss, installation of other malware, and so on.

It is important to know that RATs often run silently in the system background, and victims are not aware that they have a RAT installed on their computers. A couple of examples of other Remote Administration Trojans are TVRAT, Strigoi Master, and ObliqueRAT.

How did JacksBot infiltrate my computer?

Research shows that JacksBot is distributed via malspam campaign. More precisely, via emails pretending to be shipment notifications from DHL and containing malicious attachments (one of them is a malicious JAR file/Java ARchive used to distribute JacksBot).

It is common for malware to be distributed via phishing emails. Usually, such emails have a malicious file attached to them or contain a malicious link (e.g., a link designed to download a malicious file).

Malspam email can contain other files too, for example, malicious Microsoft Office documents, JavaScript files, executable files (like .exe), other archives like ZIP, RAR. It is important to mention that there are other ways to distribute malware as well.

For example, it can be done using fake software updaters, 'cracking' tools (unofficial software activation tools), unreliable sources for downloading files, programs like unofficial websites, freeware download sites, free file hosting pages, Peer-to-Peer networks (like torrent clients, eMule), third-party downloaders, etc.

How to avoid installation of malware?

Received emails that are not relevant and contain attachments or links should be inspected. Especially if the sender is unknown, suspicious. It is common that such emails are used by cybercriminals as channels to deliver malwasre/to trick recipients into installing malware.

Files and links in emails should be opened only when there is no reason to believe that it may be not safe. Downloads from unofficial pages, Peer-to-Peer networks, third-party downloaders, etc., should not be opened as well.

It is safe to open/execute files when they were downloaded from official pages and via direct links. Installed programs have to be activated and updated using tools functions that its official developer provides. Unofficial, third-party tools can be bundled with malware, have malicious code injected into them.

Also, it is not legal to unofficial ('cracking') tools to activate licensed programs or use pirated programs. Additionally, it is advisable to run virus scans regularly and perform them using a reputable antivirus or anti-spyware software.

If you believe that your computer is already infected, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Malspam email used to deliver JacksBot:

jacksbot rat phishing email used as distribution channel

Text in this email:

Subject: DHL Shipment Notification : 771037910321

Dear Customer,

Attached is the Original Shipping documents and BL as assigned to deliver to you.

Notification for shipment event group "Pick Up" for 17 March, 2021.

AWB Number: 771037910321
Pickup Date: 2021-03-17
Service: Express
Pieces: 3
Custom. Ref:
Description: COMMERCIAL INVOICE, BILL OF LADING, ETC DOC

Regards


Thank you for shipping with DHL Express!

Deutsche Post DHL - The Mail & Logistics Group.
2021 © DHL International GmbH. All rights reserved.

Terms & Conditions | Privacy Statement

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Quick menu:

How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Combo Cleaner Antivirus for Windows.

If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK.

During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button.

Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings".

Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options".

In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

 

manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files.

After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer.

Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs.

These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Combo Cleaner Antivirus for Windows.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

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